Here is a selection of the political reaction to Tony Blair's memoirs.
ED MILIBAND, LABOUR LEADERSHIP CANDIDATE
"Tony Blair was a politician who came of age in the 1980s, which was 30 years ago, and I really think we've got to move on from the politicians of a previous generation. We honour the contribution that they have made to our country and our party, but we don't live in the past. It's only by moving on that Labour can reconnect with people."
"The central message of the book is that if Labour stays New Labour and identifies not just with the under-privileged and protects those who are disadvantaged, but also identifies... with the majority of working people who want to achieve and are achievers, and aspire to greater control of their own lives, better education and so on, we will get elected."
"He [Mr Blair] wonders whether drinking one stiff gin and tonic and a couple of glasses of wine a night during dinner, was that a big step up? Well, it might have been for Tony who didn't normally drink; where I come from, a gin and tonic, two glasses of wine, you wouldn't give that to a budgie."
"I'm surprised Tony Blair couldn't have waited a decent interval before putting the knife into Gordon Brown. It's not helpful to the party at this point."
"It's about Tony, his political philosophy, the journey that he took both through the Labour party on a domestic and an international arena, his impatience for reform, for driving forward. His recognition that if as the Labour party we stopped reforming, then, you know, a bit like a shark has to keep swimming or it sinks, we would actually run into trouble and I think basically he's right."
"The book is trying to justify the unjustifiable. He is refusing to say sorry or express any regret - the only thing he is sorry about is fox hunting, which is a strange priority. He also appears to be saying there should be a war against Iran."
A spokesman said Mr Brown would not be making a comment on the book.